Fire extinguisher



May 20 1924. v

G. T. PEARSONS" FIRE EXTINQUISHER Filed Jan. 6, 1919 WITNESS IN VE N TOR Mfg? Patented may 20, 19.24,

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FIRE EXTINGUISHER.

Application fiiedaanu r e, 1919., SeriaLNo. 270,096.

To all whom it may canoe-m: i

Be it known that 1, Greece T. Pnnnsons, a citizen of the United States, residing in the borough of Manhattan, city, county, and

State of New York, have invented new and I the liquid whether the reservoir is full or partially empty, or held in a horizontal position or inclined upward or downward from the horizontal.

In the drawing accompanying and forming a part of this speoificationFigure 1 is a longitudinal sectional view taken on the line 11 of Figure 2 with certain portions exaggerated to more clearly bring out the invention; and

Figure 2 is a cross sectional view taken on the line BB of Figure 1 In the embodiment of my invention illus trated in the drawing there is provided a reservoir or tank for a fire extinguishing liquid having a port-ion 3 of circular form in cross section, and which for convenience is termed as a liquid carrying chamber, and having an extension of reduced width along one side thereof, as shown at 41, in which the pumping mechanism is located, to be adjacent the side wall of the reservoir. Ends 5 and 5 are secured to the body portion as by soldering or otherwise, the end 5 having a discharge outlet 6 and a fillerwopening closed by a plug 7, the plug being constructed with an inwardly opening and outwardly closing spring check valve to permit entrance of air to the reservoir as the liquid is discharged therefrom. The end 5 may be dished to permit of the standing of the syringe upon a horizontal surface.

As stated, the pumping mechanism is mounted in the portion 4.- of the reservoir, and is substantiallyof the same construction as that disclosed in my co-pending application filed June. 28, 1916, Serial No. 106,322, the piston chamber comprising a cylinder 8'to which heads 9 and 9 are connected having inlets 10 and 11 with check valves 12 and 13 opening into and closing outward from the pistonchamber to connect the piston chamber with the liquid carrying portion of the reservoir. The piston chamber is connected to and extends from theend 5 of the reservoir; substantially midway thereof and is connected to the outlet 6 by a chamber 14; which is in the nature of a compression chamber. 'A tube 15 slidably engagesina stuifing box 16 inthe end or head 9 and through a cap 17 into a hollow piston rod18,\ suchoap 17 being secured to and closing one end of the piston rod and to which the tube is fixed. The piston rod eX- tends through-a 'stufling box 20 to the exterior of the reservoir and has a hand grip 21 fixed thereto, said stufling box being carried by a nut 22 which also serves to connect the piston chamber to the reservoir end 5 in a manner to-be hereinafter set forth.

A piston head 23 having a suitable packing is mountedon the'p iston rod 18 to have alimited t0 and fro movement ibetweenthecap 17 which is in the nature of an abut-'- ment, and an abutment or collar, 24 fixed upon the piston rod. The pistonrod is con nected to the piston chamber through ports 25 therein controlled by the piston 23" to alternately'connect the piston rod and the tube 15.with the piston chamber at opposite sides of the piston at thecommencement of each outward and inward stroke of the piston, and for which purpose theopening in the piston is made of somewhat larger diameter than the piston rod to provide. a

space between the, two, and communication between said space and the piston chamber is shutoiiby cone-shaped portions 26 and 27 on the abutments co-operatingwith. correspondingly shaped seats in the ends of the piston. The tube 15 is preferably located which tube29 the outlet end of-the tube 15 slidably engages. The tube '29 carries a centrallyof the chamber 14 with the outlet line with-the axis of said chamber.

spring influenced valve 31 to engage with the end of the tube 15 when in its innermost position. The piston mechanism is locked in its innermost position with the end of the tube 15 closed by the valve 31 by a projecting portion or pin 32 on the piston rod co-operating with a cam slot 32 in an annular extension of the nut 22.

The valved inlets 10 and 11 tothe piston chamber are located in extensions 33 and 34 of the respective heads of the piston chamber, and to maintain the pumping mechanism outside of the circumference of the circular or liquid carrying chamber, of the reservoir, the piston chamber is so mounted that these extensions will lie adjacent the side wall and ends of the reservoir, as clearly shown in Figure 2 of the drawing. T at all times connect the piston chamber with the liquid in the lowermost, part of the liquid carrying chamber, the inlet extension 34 which lies contiguous to the reservoir'head has a portion 35 to extend into the liquid carrying chamber and has an opening 36 in A tube 37 having lateral ports 38 is fixed. in said opening 36, and a tube 39 to extend longitudinally of the liquid carrying chamber with its ends lying adjacent the side and opposite ends of said chamber is mounted upon the tube 37 by a Tcoupling 4:0 to ,rotate around said tube 37. The T coupling has a portion of greater diameter than the tube 37 to provide an annular chamber with which the tube ports 38 communicate, as shown at 4-1. The T coupling is retained on the tube 37 by a flanged plug 42' connected to the end of the tube and suitable gaskets or packing are interposed between the ends of the coupling, and. said plug and the. portion 35 of the extension 34: of the head 9 of the piston chamber. The inlet 10 is connected to the intake tube '39 by a pipe 43 connected at one end with the inlet 10 through extension-33 of head 9 of the piston chamber and connected at the other end to the extension 34: of inlet 11. It will be obvious that as the pumping mechanism is outside of the internal diameter of the liquid carrying chamber, that no matter in what position the syringe may be held horizontally, the intake tube, 319' may revolve about the tube 37 and is adapted to auto.- matically assume variable. positions in the liquid in the reservoir near the side which is lowermost and so arranged with relation to the pumping mechanism as not to be obstructed in its rotative movement by the pump mechanism.

To connect the pumping mechanism with the liquid in the lowermost part of. the reservoir with the discharge end of the syringe tilted upward or downward from the horizontal, valve mechanism is provided to automatically shut off the. inlet to the tube. 3.9

which is uppermost from the tube 37 and connect the lowermost inlet to the tube 39 thereto, said valve mechanism comprising a pair of valves 44: to co-operate with valve seats connected to or formed in the ends of contiguous to the side wall of the reservoir,

said pumping mechanism having a suction inlet and an outlet connected to the reservoir outlet; and an intake tube extending longitudinally of the pump connected to said suction inlet revolubly supported and constructed and arranged to circumscribe a complete circle in its movement in that part of the reservoir not occupied by the pumping mechanism.

2. In a syringe, the combination of a reservoir having an outlet; a piston chamber supported in a fixed position in the reservoir at the side thereof and connected to the reservoir outlet and having a suction inlet; a piston to reciprocate in said chamber; and an intake tube extending longitudinally of the reservoir connected to the suction inlet and supported to have revolving movement through a complete circle without participating movement or" the pumping mechanism and uninterrupted in its movement by the pumping mechanism in all positions thereof, for the purpose specified.

3. In a syringe, the combination of a reservoir having an outlet; a piston chamber located at the side of the reservoir and connected to the reservoir outlet, said chamber having suction inlets adjacent opposite ends; a piston to reciprocate in said chamber; an intake connected to the suction inlets having inlets from opposite ends of the reservoir; and means to revolubly support said intake to have movement through a complete circle, for the purpose specified.

4. In a syringe, the combination of a reservoir having an outlet; a piston ch amber supported in a fixed position in the reservoir and connected to the reservoir outlet, said chamber having suction inlets adjacent. opposite ends; piston mechanism to draw liquid through the suction inlets to opposite ends of the piston chamber and discharge said liquid through the'reservoir outlet; a tube extending longitudinally of and with its ends adjacent opposite ends and the side of the reservoir; and means to connect said tube in fluid connection with the suction inlets, of the piston chamber and support the tube to revolve through a complete circle independent of any participating movement of the piston cham- T lit her and the suction inlets thereto forthe purpose specified. I 5. In a syringe, the combinationlofa reservoir having an outlet; a piston chamber lo-- catedat the side of the reservoir; suction inlet means for the piston chamber leading to opposite ends thereof and "having an inlet at one side of the piston chamber and adjacent an end of the reservoir; and an intake revoluble through a complete circle in fluid voir having an outlet com'prising a cylinder having an extension of reduced width. along one side thereof; pumping mechanism immovably mounted in said reduced portion of the reservoirconnected to the reservoir outlet and having an inlet port; and an intake tube to said port revoluble through a complete circle in the reservoir, for the purpose specified.

7 A syringe comprising a cylinder having 7 an extension of reduced width along one side thereof; a reciprocable piston cylinder pump immovably mounted in said extended portion of the reservoir and connected to the reservoir outlet and having apart extending laterally into the portion of the cylinderopposite to the pump with a port to connect the pump cylinder with the reservoir; and a tube extending longitudinally of the reservoir with its ends adjacent the side and opposite ends thereof and connected to the port in the laterally extended part of the pump to revolve on an axis longltudinally of the reservoir, for the purpose specified.

8. A syringe, comprising a cylinder hav ing an extension of reduced width along one side thereof; pumping mechanism immovably mounted in the extended portion of the reservoir connected to the reservoir outlet; and a suction inlet tube connected to the pumping mechanism extending longitudinally of the reservoir and revoluble through a com lete circle on an axis extending longitudina ly of the reservoir without participating movement of the pumping mechanism, for the purpose specified.

9. A syringe comprising a cylinder having an extension of reduced widthalong one side thereof; a pump chamber immovably mounted in said extended portion connected to the reservoir outlet and having inlets in lateral projections adjacent opposite ends; valves in said inlets opening into and closing outward from said chamber; a piston to reciprocate in said chamber; and an intake tube in fluid connection with said inlets to extend longitudinally of the reservoir and revolve through a complete circle on an axis extending longitudinally of the reservoir, for the purpose specified.

syringe comprising a cylinder having an extension of reduced. width along one side thereof; a piston chamber immove ably mounted in said extended portionconnected to the'reservoir outlet and having inlets in lateral projections adjacent oppositeends, one of said projections being adjacent one end of the reservoir and having a port opening into the reservoir; a piston to reciprocatein said chamber; a tube in the extended portion of the reservoir to connect the inlets in the piston chamber projections in fluid connection; and a tube extending longitudinally of the reservoir with itsends lying adjacent the side and opposite ends of thereservoir and connected to the'port in the one piston chamber projectionto revolve through a complete circle on an axis extending longitudinally of the reservoir, for the purpose specified.

11. In a syringe, the combination of a liquid carrying reservoir having an extension of reduced width along'one side there- I of; apiston chamber located in said extended portion of the reservoir; a piston to reciprocate in said chamber; and an intake to said piston chamber from the reservoir located at one side of the piston chamber and supported to rotate through a complete circle on an axis longitudinally of the res ervoir andadapted to assume a position below its axis of rotation without participating movement of the piston chamber. and unobstructed in its movement by the piston chamber in all positions thereof.

12. Inca syringe, a liquid carrying reserthe side of the reservoir and rotatable on an axis longitudinally of the reservoir and adapted to assume variable positions in the reservoir around its axis of rotation without participating movement of the piston chamber and unobstructed in its movement by the piston chamber in all positions thereof.

13. In a syringe, a liquid carrying reservoir havingan extension of reduced width along one side thereof; apiston chamber located in said extendedportion of the reservoir; a piston to reciprocate in said chamber; and an intake to said piston. chamber having inlets from opposite ends of the reservoir and rotatable through a complete circle on an axis longitudinally of the reservoir,

and said intake being adapted to assume voir; a piston chamber 1n said reservoir at i plete circle on an axis longitudinally of the reservoir and adapted toassume variable positions in the reservoir without participating movement of the piston mechanism; and valve mechanism operable to shut 011 one of the inlets to the intake from the reservoir when the other is 0 en to the reservoir, for thepurpose specified. 15. A the extinguisher comprisinga cylindrical pump having inlets to opposite ends 7 thereof; a tube having inlets, to opposite ends supported by the pump influid communication with the inlets thereto and to revolve through a complete circle Without participating movement of the pump; and a reservoir having an outlet in which the pump with the connected tube is mounted at the side thereof with the pump in communication with the outlet of the reservoir for the purpose specified.

16. A syringe comprising a reservoir having an outlet; pumping mechanismimmovably mounted 1n the reservoir; ,a tube in communication with the pumping mechanisin and reservoir, said tube extending longitudinally of and having inlets from opposite ends of the reservoir and supported to have revolving movement through a complete circle without like participating movement of the pumping mechanism; and valve mechanism operable to shut off communication between'said tube and the reservoir outlet through the pumping mechanism.

r GEO. T. PEARSONS. 

